Mercurial > hg
view tests/test-update-atomic.t @ 41289:593f6359681d
update: fix edge-case with update.atomic-file and read-only files
We used to create the tempfile with the original file mode. That means
creating a read-only tempfile when the original file is read-only, which crash
if we need to write on the tempfile.
The file in the working directory ends up being writable with and without the
atomic update config, so the behavior is the same.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Thu, 10 Jan 2019 14:57:01 +0100 |
parents | |
children | 40787a96fda7 |
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#require execbit unix-permissions Checking that experimental.atomic-file works. $ cat > $TESTTMP/show_mode.py <<EOF > from __future__ import print_function > import sys > import os > from stat import ST_MODE > > for file_path in sys.argv[1:]: > file_stat = os.stat(file_path) > octal_mode = oct(file_stat[ST_MODE] & 0o777) > print("%s:%s" % (file_path, octal_mode)) > > EOF $ hg init repo $ cd repo $ cat > .hg/showwrites.py <<EOF > def uisetup(ui): > from mercurial import vfs > class newvfs(vfs.vfs): > def __call__(self, *args, **kwargs): > print('vfs open', args, sorted(list(kwargs.items()))) > return super(newvfs, self).__call__(*args, **kwargs) > vfs.vfs = newvfs > EOF $ for v in a1 a2 b1 b2 c ro; do echo $v > $v; done $ chmod +x b* $ hg commit -Aqm _ # We check that # - the changes are actually atomic # - that permissions are correct (all 4 cases of (executable before) * (executable after)) # - that renames work, though they should be atomic anyway # - that it works when source files are read-only (but directories are read-write still) $ for v in a1 a2 b1 b2 ro; do echo changed-$v > $v; done $ chmod -x *1; chmod +x *2 $ hg rename c d $ hg commit -qm _ Check behavior without update.atomic-file $ hg update -r 0 -q $ hg update -r 1 --config extensions.showwrites=.hg/showwrites.py 2>&1 | grep "a1'.*wb" ('vfs open', ('a1', 'wb'), [('atomictemp', False), ('backgroundclose', True)]) $ python $TESTTMP/show_mode.py * a1:0644 a2:0755 b1:0644 b2:0755 d:0644 ro:0644 Add a second revision for the ro file so we can test update when the file is present or not $ echo "ro" > ro $ hg commit -qm _ Check behavior without update.atomic-file first $ hg update -C -r 0 -q $ hg update -r 1 6 files updated, 0 files merged, 1 files removed, 0 files unresolved $ python $TESTTMP/show_mode.py * a1:0644 a2:0755 b1:0644 b2:0755 d:0644 ro:0644 Manually reset the mode of the read-only file $ chmod a-w ro $ python $TESTTMP/show_mode.py ro ro:0444 Now the file is present, try to update and check the permissions of the file $ hg up -r 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ python $TESTTMP/show_mode.py ro ro:0644 # The file which was read-only is now writable in the default behavior Check behavior with update.atomic-files $ cat >> .hg/hgrc <<EOF > [experimental] > update.atomic-file = true > EOF $ hg update -C -r 0 -q $ hg update -r 1 --config extensions.showwrites=.hg/showwrites.py 2>&1 | grep "a1'.*wb" ('vfs open', ('a1', 'wb'), [('atomictemp', True), ('backgroundclose', True)]) $ hg st -A --rev 1 C a1 C a2 C b1 C b2 C d C ro Check the file permission after update $ python $TESTTMP/show_mode.py * a1:0644 a2:0755 b1:0644 b2:0755 d:0644 ro:0644 Manually reset the mode of the read-only file $ chmod a-w ro $ python $TESTTMP/show_mode.py ro ro:0444 Now the file is present, try to update and check the permissions of the file $ hg update -r 2 --traceback 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ python $TESTTMP/show_mode.py ro ro:0644 # The behavior is the same as without atomic update